Recent applications of plasma-based ion implantation and deposition to microelectronic, nano-structured, and biomedical materials

Chu, Paul K.

doi:10.1016/j.surfcoat.2010.01.045

Cited by 29 publications

(7 citation statements)

References 74 publications

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“…(2) In addition, the vacancy-argon complexes (vAr) also may dissociate forming an argon interstitial and a separate vacancy.…”

Section: Temperature Range IIImentioning

confidence: 99%

“…1,2 In addition to the main sputtering-deposition processes, different kinds of defects of a crystalline lattice, such as vacancies, interstitials, and their complexes, are induced near a surface under the ion irradiation. Further evolution of the defects can lead to their aggregation in clusters, forming nanocavities filled with the implanted gas.…”

Section: Introductionmentioning

confidence: 99%

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Temperature-induced evolution of subsurface nanocavities in argon-implanted copper

et al. 2011

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The evolution of argon-filled nanocavities in a copper crystal under annealing is studied experimentally and theoretically. The subsurface argon-filled nanocavities are formed after a short annealing at a temperature ∼1000 K by coalescence of subsurface defects initially created by argon implantation. The further prolonged annealing at a temperature above 1075 K leads to decomposition of the nanocavities and diffusion of implanted argon out of the sample. According to a simple analysis, the mechanism of the nanocavity formation is governed not only by the migration of simplest defects, such as vacancies and argon and copper interstitials, but also to a large extent, by diffusion and interaction of the complexes of these simplest defects. The experimental studies with x-ray photoelectron spectroscopy and scanning tunneling microscopy and spectroscopy provide valuable data sets of the density of nanocavities and their size and depth distribution. Based on the experimental results, a theoretical model is developed. The calculation with the model proves that the growth of the nanocavities is mainly determined by the temperature-induced migration of vacancy-argon complexes. By combining the experimental data with the simulation results, the migration energy of these kinds of complexes is estimated ∼2.55-2.75 eV. Moreover, the calculation with our model provides the estimate of the dissociation energy of a multiple complex, consisting of two vacancies and two argon atoms, as 1.10-1.18 eV. These parameters, reported in this article, play a key role in the description of the kinetics of the growth and decomposition of nanocavities.

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“…(2) In addition, the vacancy-argon complexes (vAr) also may dissociate forming an argon interstitial and a separate vacancy.…”

Section: Temperature Range IIImentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature-induced evolution of subsurface nanocavities in argon-implanted copper

et al. 2011

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“…Показана эффективность использования низкотемпературного метода ра-диочастотного магнетронного распыления для создания плазменного покрытия на поверхно-стях из NiTi с целью регулирования гидрофиль-ных свойств, повышения клеточной адгезии и АНАЛИТИЧЕСКИЕ ОБЗОРЫ улучшения биосовместимости [50,51]. Важным преимуществом модификации поверхности ме-тодом плазменно-иммерсионной ионной им-плантации и осаждения металлов (PIII&D) по сравнению с другими методами (механической, физической, химической) является способность избирательного изменения свойств поверхности в районе несколько сотен нанометров, в то время как характеристики основной площади материа-ла остаются неизменными [52,53]. Использова-ние различных ионов в методе PIII&D позволяет регулировать свойства поверхности для созда-ния благоприятных условий интеграции с теми или иными видами клеток.…”

Section: повышение биосовместимости металличе-ских поверхностей с помunclassified

Surface Modification of Bare-Metal Stents for Preventing Restenosis (Part 2)

Лотков¹,

Матвеева²,

Антонова³

et al. 2017

Kompleks. probl. serdečno-sosud. zabol.

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Резюме. Вторая часть обзора посвящена вариантам модификации металлических стентов для ускоре-ния эндотелизации in situ. Представлены разработки. направленные на захват эндотелиальных прогени-торных клеток из кровотока с помощью специфических антител. Описаны возможности улучшения адгезии и интеграции эндотелиальных клеток на поверхности за счет формирования сайтов клеточного распозна-вания и имитация структур внеклеточного матрикса. Проанализированы различные способы физической и химической модификации, способствующие созданию условий для скорейшего формирования функцио-нально состоятельного эндотелиального слоя на искусственных поверхностях. Определен круг проблем и ограничений в использовании каждого из методов.Ключевые слова: металлические стенты, рестеноз, модификация поверхности, эндотелизация. Here we review the modifications of the metal stents to enhance in situ endothelialization, particularly antibody-mediated adhesion of endothelial progenitor cells. We focus on the strategies employing cell adhesion molecules and extracellular matrix proteins. We also encompass other physical and chemical approaches for surface biofunctionalization with their advantages and shortcomings. SURFACE MODIFICATION OF BARE-METAL STENTS FOR PREVENTING RESTENOSISKeywords: bare-metal stents, restenosis, surface modification, endothelialization НИИ КПССЗ имеет большой опыт в разработке изделий для сердечно-сосудистой хирургии, в частности биопротезов кла-панов сердца и сосудов. С 2010 года под руководством академика РАН л. С. Барбараша начаты исследования по созданию био-резорбируемых сосудистых протезов малого диаметра. Основная цель -создание полимерных конструкций с бионаправленным действием, способных заменить отдельные структуры живого организма, в частности сердечно-сосудистой системы. Научная но-визна поставленной задачи заключается в использовании нового подхода создания органа непосредственно в организме пациента за счет биофункциональности и биорезорбируемости полимерных конструкций. доказана долгосрочная проходимость полимерных сосудистых графтов на основе поликапролактона и композиции полигидроксибутирата/валерата и поликапролактона. В экспери-ментах in vitro доказано, что ростовые факторы, инкорпорируемые в состав биодеградируемых графтов, сохраняют свою био-логическую активность. В долгосрочных экспериментах in vivo доказано, что сосудистый эндотелиальный фактор роста ускоряет эндотелизацию и улучшает проходимость биодеградируемых полимерных сосудистых графтов.Ключевые слова: биодеградируемые полимеры, сосудистый графт, ростовые факторы. DEVELOPMENT OF TISSUE ENGINEERED SMALL DIAMETER VASCULAR GRAFT FOR THE CARDIOVASCULAR SURGERY NEEDS L. V. ANTONOVA, YU. A. KUDRYAVTSEVA Federal State Budgetary Scientific Institution Research Institute for Complex Issues of Cardiovascular Diseases. Kemerovo, RussiaRICICd has large experience in the development of products for cardiovascular surgery, in particular, the bioprosthesis heart valves and blood vessels. Since 2010, under the leadership of the academician of RAS L. S. Bar...

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“…DLC films can provide several attractive properties such as high hardness, good wear and electrical properties, chemical inertness and biocompatibility [3][4][5][6][7][8][9]. The structure and, hence, the properties of the films depend on the preparation technique and the specific preparation conditions, however.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Diamond-like Carbon Films by Plasma Source Ion Implantation with External Glow Discharge

Hatada

Baba

Flege

et al. 2012

Trans. Mat. Res. Soc. Japan

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High hardness diamond-like carbon (DLC) films with good adhesion can be prepared by plasma source ion implantation in combination with radio frequency glow discharge plasma. Acetylene gas was used as the source gas to deposit the DLC films. Either pulses of -18 kV with a repetition rate of 1 kHz or DC voltages from -0.5 to -3 kV were applied to the substrate holder. A radio frequency (RF) of 13.56 MHz was applied to a counter electrode to generate a glow discharge plasma. The films were deposited on austenitic type stainless steel SUS304 as well as silicon wafers and characterized regarding thickness and surface morphology by cross-sectional SEM and by AFM, respectively. The chemical structure was investigated by Raman spectroscopy. The hardness of the films was evaluated by an indentation method. Furthermore, a ball-on-disc test was employed to obtain information about the frictional properties and sliding wear resistance of the films. The deposition rates of the films were enhanced by the RF discharge. The I D /I G value varied, depending on the deposition condition, in the range of 0.49 to 2.0. The hardness of the DLC films was around 19 GPa for the film deposited without RF and up to 26 GPa for the films deposited with RF discharge. A low friction coefficient was derived for all films prepared in this study, with lowest values of 0.04.

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Recent applications of plasma-based ion implantation and deposition to microelectronic, nano-structured, and biomedical materials

Cited by 29 publications

References 74 publications

Temperature-induced evolution of subsurface nanocavities in argon-implanted copper

Temperature-induced evolution of subsurface nanocavities in argon-implanted copper

Surface Modification of Bare-Metal Stents for Preventing Restenosis (Part 2)

Preparation of Diamond-like Carbon Films by Plasma Source Ion Implantation with External Glow Discharge

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